Hi community , i am not able to print the payload and response from network tab in katalon console. can anyone respond me regards this

API Testing
,
1

i’m facing some issue, while trying to catch payload

2 Likes
2

Please explain what you have done.

1 Like
3

what issue you are facing? what is the error ? share the error logs,

4

from network tab in katalon console

What is the “network tab in katalon console”? I have never seen such thing.

Could you provide a screenshot of the “network tab in katalon console”?

1 Like
5 
import com.kms.katalon.core.webservice.keyword.WS
import com.kms.katalon.core.webservice.objects.RequestObject
import com.kms.katalon.core.webservice.objects.ResponseObject

// 1. Define your Request Object (assuming you have one in Object Repository)
// Or create one dynamically like this:
RequestObject request = new RequestObject()

// 2. Define the request details
request.setRestRequestMethod('POST')
request.setRestUrl('https://jsonplaceholder.typicode.com/posts')
request.setHttpHeaderProperties([new com.kms.katalon.core.webservice.common.HttpHeader('Content-Type', 'application/json')])

// 3. Set the payload (request body)
String payload = '{"title": "foo", "body": "bar", "userId": 1}'
request.setHttpBody(payload)

// 4. Print the Request Payload BEFORE sending
println "--- Request Payload ---"
println request.getHttpBody()
println "-----------------------"

// 5. Send the request and get the response
ResponseObject response = WS.sendRequest(request)

// 6. Print the Response Body AFTER receiving
println "--- Response Body ---"
println response.getResponseBodyContent()
println "---------------------"

// Optional: Print the status code as well
println "Response Status Code: " + response.getStatusCode()

were you able to catch the payload with the above example @chetan.chavan

2 Likes
6

let me check i was looking for same idea

7

@chetan.chavan

This usually happens because Katalon does not automatically capture Network tab traffic (payload/response) like a browser’s DevTools does. You need to explicitly enable or handle it depending on your approach.

Here are a few ways to fix it:

1. Enable DevTools / HAR capture (Recommended)

Katalon doesn’t log API payloads from UI execution by default. You can enable network capturing using DevTools:

  • Use Chrome DevTools Protocol (CDP) in Katalon

  • Enable Network tracking before your action:

import com.kms.katalon.core.webui.driver.DriverFactory
import org.openqa.selenium.devtools.DevTools
import org.openqa.selenium.devtools.v109.network.Network

def driver = DriverFactory.getWebDriver()
DevTools devTools = driver.getDevTools()
devTools.createSession()
devTools.send(Network.enable(Optional.empty(), Optional.empty(), Optional.empty()))

devTools.addListener(Network.requestWillBeSent(), { request ->
    println("Request Payload: " + request.getRequest().getPostData())
})

devTools.addListener(Network.responseReceived(), { response ->
    println("Response: " + response.getResponse().getUrl())
})

2. If you’re testing APIs (Web Service Requests)

If this is for API testing:

  • Use WS.sendRequest()

  • Then print response like:

def response = WS.sendRequest(findTestObject('YourRequest'))

println("Response Body: " + response.getResponseBodyContent())
println("Status Code: " + response.getStatusCode())

3. Common issues to check

  • Payload is null → request might be GET (no body)

  • Console not printing → check Log Viewer settings

  • Using Web Recorder → it does NOT capture network payloads

  • Running in headless mode → sometimes CDP logs are limited

Bottom line

Katalon by default doesn’t expose Network tab payloads, so you must use DevTools (CDP) or API request methods to capture and print them.

8

Another possible approach: BrowserMob Proxy in Katalon Studio, a sample project